Soak 0.3 g saffron in 4 teaspoons of hot water in a small dish and set aside.
Cover 250 g basmati rice with water and leave to soak for 20 minutes. Drain the rice, reserving the soaking liquid.
Melt 100 g ghee in a heavy pan set over very low heat. Add the whole spices for the ghee and 1 g fresh ginger, then cook gently for 15 minutes to perfume the fat.
Take the pan off the heat. Add 200 g granulated sugar, the saffron with its soaking liquid, and 0.1 g food colouring, stirring gently until the sugar is evenly distributed. Fold in the drained rice, pour in the reserved soaking liquid, and add salt to taste.
Set the pan back over low heat and simmer for approximately 20 minutes until the rice grains are tender. Mix 0.1–0.2 g kewra water with a splash of water and drizzle over the surface.
Use 120% of the weight; melt gently over low heat to avoid burning the milk solids, which will yield a softer, creamier richness rather than a nutty aroma.
Use about a third of the weight (0.5 g ground for a 2.5 cm piece), stirred in with the ground spices rather than fried whole, since the powder burns quickly.
Use 20% to 25% of the weight (1 g for every 4 to 5 g fresh). Stir into the gravy; adds peppery heat and warmth, though it misses the crisp, zesty kick of raw root.
Use a pinch, about 0.25 g, for a few drops of colouring. Mix with a spoon of water or oil and add with the spices; it adds earthy flavour and can turn orange.